IOS开发UI篇—手势识别器（拖拽+旋转+缩放）

 1 //
 2 //  YYViewController.m
 3 //  06-拖拽事件
 4 //
 5 //  Created by apple on 14-6-19.
 6 //  Copyright (c) 2014年 itcase. All rights reserved.
 7 //
 8 
 9 #import "YYViewController.h"
10 
11 @interface YYViewController ()
12 @property (strong, nonatomic) IBOutlet UIView *iconView;
13 
14 @end
15 
16 @implementation YYViewController
17 
18 - (void)viewDidLoad
19 {
20     [super viewDidLoad];
21 
22     //拖拽事件
23     UIPanGestureRecognizer *pan=[[UIPanGestureRecognizer alloc]init];
24     [self.iconView addGestureRecognizer:pan];
25     [pan addTarget:self action:@selector(panView:)];
26 }
27 
28 -(void)panView:(UIPanGestureRecognizer*)pan
29 {
30     //以控制器上的view的左上角为坐标原点
31     CGPoint point=[pan locationInView:pan.view];
32     NSLog(@"拖拽事件");
33     NSLog(@"获取到的触摸点的位置为:%@",NSStringFromCGPoint(point));
34     
35     CGPoint point1=[pan translationInView:pan.view];
36     NSLog(@"拖拽事件1");
37     NSLog(@"获取到的触摸点的位置为:%@",NSStringFromCGPoint(point1));
38     
39     //手指拖动，让自定义的view也跟着手指移动
40     CGPoint temp=self.iconView.center;
41     temp.x+=point1.x;
42     temp.y+=point1.y;
43     self.iconView.center=temp;
44     
45     //清空
46     [pan setTranslation:CGPointZero inView:pan.view];
47 }
48 @end

 1 //
 2 //  YYViewController.m
 3 //  07-旋转
 4 //
 5 //  Created by apple on 14-6-19.
 6 //  Copyright (c) 2014年 itcase. All rights reserved.
 7 //
 8 
 9 #import "YYViewController.h"
10 
11 @interface YYViewController ()
12 @property (weak, nonatomic) IBOutlet UIImageView *iconView;
13 
14 @end
15 
16 @implementation YYViewController
17 
18 - (void)viewDidLoad
19 {
20     [super viewDidLoad];
21     
22     //旋转
23     //创建手势识别器（旋转）
24     UIRotationGestureRecognizer *gesture=[[UIRotationGestureRecognizer alloc]init];
25     //添加手势识别器
26     [self.iconView addGestureRecognizer:gesture];
27     //监听
28     [gesture addTarget:self action:@selector(gestureView:)];
29 }
30 
31 -(void)gestureView:(UIRotationGestureRecognizer*)gesture
32 {
33     
34     //旋转的弧度：gesture.rotation
35     NSLog(@"旋转事件，旋转的弧度为:%1f",gesture.rotation);
36     
37     //让图片跟随手指一起旋转
38     //每次从最初的位置开始
39 //    self.iconView.transform=CGAffineTransformMakeRotation(gesture.rotation);
40     
41     //在传入的transform的基础上旋转
42     //在之前的基础上，让图片跟随一起旋转（去掉自动布局）
43     //注意问题：以风火轮的速度旋转
44     self.iconView.transform=CGAffineTransformRotate(self.iconView.transform, gesture.rotation);
45     //将旋转的弧度清零
46     //（注意不是将图片旋转的弧度清零，而是将当前手指旋转的弧度清零）
47     gesture.rotation=0;
48 }
49 @end

 1 //
 2 //  YYViewController.m
 3 //  07-旋转
 4 //
 5 //  Created by apple on 14-6-19.
 6 //  Copyright (c) 2014年 itcase. All rights reserved.
 7 //
 8 
 9 #import "YYViewController.h"
10 
11 @interface YYViewController ()<UIGestureRecognizerDelegate>
12 @property (weak, nonatomic) IBOutlet UIImageView *iconView;
13 
14 @end
15 
16 @implementation YYViewController
17 
18 - (void)viewDidLoad
19 {
20     [super viewDidLoad];
21     [self pinchTest];
22     [self gestureTest];
23 }
24 
25 -(void)pinchTest
26 {
27         //缩放
28     UIPinchGestureRecognizer *pinch=[[UIPinchGestureRecognizer alloc]init];
29     [self.iconView addGestureRecognizer:pinch];
30     [pinch addTarget:self action:@selector(pinchView:)];
31     
32     //设置代理
33     pinch.delegate=self;
34 }
35 
36 -(void)pinchView:( UIPinchGestureRecognizer* )pinch
37 {
38     //缩放的比例    pinch.scale;
39     NSLog(@"缩放：%f",pinch.scale);
40     //对图片进行缩放
41 //    self.iconView.transform=CGAffineTransformMakeScale(pinch.scale,pinch.scale);
42     //在已有的基础上对图片进行缩放
43     self.iconView.transform=CGAffineTransformScale(self.iconView.transform, pinch.scale, pinch.scale);
44     //清零
45     pinch.scale=1.0;
46 }
47 -(void)gestureTest
48 {
49     //旋转
50     //创建手势识别器（旋转）
51     UIRotationGestureRecognizer *gesture=[[UIRotationGestureRecognizer alloc]init];
52     //添加手势识别器
53     [self.iconView addGestureRecognizer:gesture];
54     //监听
55     [gesture addTarget:self action:@selector(gestureView:)];
56     
57     //设置代理
58     gesture.delegate=self;
59 }
60 -(void)gestureView:(UIRotationGestureRecognizer*)gesture
61 {
62     
63     //旋转的弧度：gesture.rotation
64     NSLog(@"旋转事件，旋转的弧度为:%1f",gesture.rotation);
65     
66     //让图片跟随手指一起旋转
67     //每次从最初的位置开始
68 //    self.iconView.transform=CGAffineTransformMakeRotation(gesture.rotation);
69     
70     //在传入的transform的基础上旋转
71     //在之前的基础上，让图片跟随一起旋转（去掉自动布局）
72     //注意问题：以风火轮的速度旋转
73     self.iconView.transform=CGAffineTransformRotate(self.iconView.transform, gesture.rotation);
74     //将旋转的弧度清零
75     //（注意不是将图片旋转的弧度清零，而是将当前手指旋转的弧度清零）
76     gesture.rotation=0;
77 }
78 
79 //实现代理方法
80 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
81 {
82     //默认为NO,这里设置为YES
83     return YES;
84 }
85 @end